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