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