One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(9,10)(11,14)(12,13)(15,16)(17,18,22,23)(19,21,26,31)(20,27,30,24)(25,29,32,28)(1,3)(2,5)(4,8)(6,7)(17,19,22,26)(18,21,23,31)(20,28,30,29)(24,32,27,25)(10,13)(14,16)(17,20,23,27,22,30,18,24)(19,25,21,28,26,32,31,29)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(17,18,22,23)(19,21,26,31)(20,24,30,27)(25,28,32,29)(3,8)(5,7)(17,21,23,26,22,31,18,19)(20,29,27,25,30,28,24,32)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.