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)(17,18,23,26)(19,24,20,29)(21,27,22,31)(25,28,32,30)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,20)(18,24,26,29)(21,30,22,28)(25,31,32,27)(10,13)(14,16)(17,20,23,19)(18,25,26,32)(21,30,22,28)(24,31,29,27)(1,3,4,7)(2,6,5,8)(11,15)(14,16)(18,26)(24,29)(25,32)(27,31)(9,11,12,15)(10,14,13,16)(17,21,23,22)(18,27,26,31)(19,28,20,30)(24,32,29,25)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.