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