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