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