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