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