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