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