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