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