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