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