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