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