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