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