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