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