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