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