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