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