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