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