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