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