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