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