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