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