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