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