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