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