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