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