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