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