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