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