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