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