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