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