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