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