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