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