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