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