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