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