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