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