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