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