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