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