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