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