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