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