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