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