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