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