One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(11,15)(13,16)(17,18,23,25,21,27,22,28)(19,29,36,38,30,24,32,40)(20,33,37,42,34,26,35,41)(31,39,46,48,44,43,45,47)(2,5)(3,7)(9,10)(11,16)(12,14)(13,15)(17,19,21,30)(18,24,27,29)(20,31,34,44)(22,32,23,36)(25,40,28,38)(26,39,33,43)(35,45,37,46)(41,48,42,47)(9,11,12,15)(10,13,14,16)(18,25)(19,30)(20,34)(22,23)(24,38)(26,42)(27,28)(29,40)(33,41)(39,48)(43,47)(45,46)(1,3,4,7)(2,6,5,8)(11,15)(13,16)(17,20)(18,26)(19,31)(21,34)(22,35)(23,37)(24,39)(25,41)(27,33)(28,42)(29,43)(30,44)(32,45)(36,46)(38,47)(40,48)(2,5)(6,8)(10,14)(13,16)(19,30)(20,34)(24,29)(26,33)(32,36)(35,37)(38,40)(41,42) 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.