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