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