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