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