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