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