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