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