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