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)(19,28)(20,33)(21,26)(22,37)(23,27)(24,31)(25,35)(29,43)(30,39)(32,42)(34,48)(36,40)(38,44)(41,45)(46,47) involution — undirected(9,10)(11,15)(12,14)(13,16)(17,19,22,31,23,32,21,30)(18,24,26,28,27,39,37,42)(20,29,36,46,35,45,34,44)(25,38,40,41,33,47,48,43)(2,5)(6,8)(9,11,12,16)(10,13,14,15)(17,20)(18,25)(19,29)(21,34)(22,36)(23,35)(24,38)(26,40)(27,33)(28,41)(30,44)(31,46)(32,45)(37,48)(39,47)(42,43)(10,14)(13,15)(17,21,23,22)(18,26,27,37)(19,30,32,31)(20,34,35,36)(24,28,39,42)(25,40,33,48)(29,44,45,46)(38,41,47,43)(1,3,4,7)(2,6,5,8)(20,35)(25,33)(29,45)(34,36)(38,47)(40,48)(41,43)(44,46)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.