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