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