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