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