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