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