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