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