One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,7)(5,9)(6,11)(10,15)(12,14)(13,16)(17,18,22,26)(19,23,20,24)(21,25,29,32)(27,30,28,31)(33,34)(35,36)(37,45)(38,40)(39,42)(41,48)(43,47)(44,46)(4,12)(7,14)(10,16)(13,15)(17,18)(19,23)(20,24)(21,25)(22,26)(27,30)(28,31)(29,32)(33,35)(34,38)(36,42)(37,46)(39,40)(41,44)(43,48)(45,47) involution — undirected(1,3)(2,6)(4,10)(5,11)(7,13)(8,9)(12,16)(14,15)(17,19,22,20)(18,23,26,24)(21,27,29,28)(25,30,32,31)(33,36,39,38)(34,40,42,35)(37,44,48,47)(41,46,45,43)(1,4)(2,7)(3,10)(5,12)(6,13)(8,15)(9,14)(11,16)(17,18)(19,23)(20,24)(21,25)(22,26)(27,30)(28,31)(29,32)(33,37)(34,41)(35,43)(36,44)(38,47)(39,48)(40,46)(42,45) involution — undirected(1,3)(2,8)(4,10)(5,11)(6,9)(7,15)(12,16)(13,14)(17,20,22,19)(18,24,26,23)(21,27,29,28)(25,30,32,31)(33,35)(34,36)(37,43)(38,42)(39,40)(41,44)(45,47)(46,48)(1,2)(3,6)(4,7)(5,9)(8,11)(10,13)(12,14)(15,16)(17,21)(18,25)(19,27)(20,28)(22,29)(23,30)(24,31)(26,32)(33,38,39,36)(34,40,42,35)(37,47,48,44)(41,46,45,43)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.