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