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