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