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)(20,22)(21,29)(23,26)(24,28)(25,31)(30,32)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,28)(18,24,20,27)(21,30,31,26)(23,25,32,29)(1,3,4,7)(2,6,5,8)(10,14)(11,16)(17,20,22,18)(19,24,28,27)(21,29,31,25)(23,30,32,26)(10,14)(13,15)(17,21,23,24,22,31,32,27)(18,25,26,19,20,29,30,28)(2,5)(6,8)(10,14)(13,15)(18,20)(21,31)(24,27)(26,30) 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.