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