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