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