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