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