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