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