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)(19,25)(20,23)(21,24)(22,27)(26,30)(28,32)(29,31) involution — undirected(1,3,5,11)(2,6,7,15)(4,13,14,10)(8,16,12,9)(18,23)(19,20)(21,30)(24,31)(25,27)(26,32)(1,2)(3,6)(4,8)(5,7)(9,10)(11,15)(12,14)(13,16)(18,24)(21,30)(23,31)(25,32)(26,27)(28,29) involution — undirected(2,7)(6,15)(8,12)(9,16)(17,19,22,20)(18,23,27,25)(21,28,30,29)(24,31,26,32)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.