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