One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,8)(5,6)(7,10)(11,15)(12,13)(14,16)(17,18,22,23)(19,21,26,24)(20,25,28,30)(27,29,32,31)(33,34,38,36)(35,40,42,39)(37,44,45,41)(43,46,48,47)(2,6)(7,9)(8,13)(14,15)(18,23)(20,28)(21,24)(27,32)(35,42)(37,45)(39,40)(41,44) involution — undirected(3,10)(4,12)(7,9)(8,13)(18,23)(19,26)(20,28)(29,31)(33,35,38,42)(34,39,36,40)(37,43,45,48)(41,46,44,47)(1,3)(2,7)(4,11)(5,10)(6,9)(8,14)(12,16)(13,15)(17,19)(18,24)(20,27)(21,23)(22,26)(25,31)(28,32)(29,30)(33,36,38,34)(35,39,42,40)(37,44,45,41)(43,46,48,47)(1,4)(2,8)(3,11)(5,12)(6,13)(7,14)(9,15)(10,16)(17,20)(18,25)(19,27)(21,29)(22,28)(23,30)(24,31)(26,32)(33,35)(34,40)(36,39)(37,43)(38,42)(41,47)(44,46)(45,48) involution — undirected(1,2)(3,7)(4,8)(5,6)(9,10)(11,14)(12,13)(15,16)(17,21,22,24)(18,19,23,26)(20,29,28,31)(25,27,30,32)(33,37)(34,41)(35,43)(36,44)(38,45)(39,46)(40,47)(42,48)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.