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