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