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