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