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