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