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