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