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