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