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