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)(13,15)(17,18)(19,22,26,30)(20,23)(21,24)(25,29,27,31)(28,32)(1,2,4,6,5,8,12,14)(3,7,11,13,10,16,9,15)(17,19)(18,22,24,30)(20,27)(21,26)(23,31,32,29)(25,28)(1,3)(2,7)(4,11)(5,10)(6,13)(8,16)(9,12)(14,15)(20,28)(23,32)(25,27)(29,31) involution — undirected(2,8)(3,10)(6,14)(9,11)(17,20,21,28)(18,23,24,32)(19,25,26,27)(22,29,30,31)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.