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