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