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