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