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