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