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