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)(17,18,22,26)(19,23,21,25)(20,28,29,31)(24,30,32,27)(1,3,7,13)(2,4,8,15)(5,14,6,9)(10,12,11,16)(17,19,22,21)(18,23,26,25)(20,27,29,30)(24,31,32,28)(2,8)(3,13)(9,14)(10,11)(17,20)(18,24)(19,27)(21,30)(22,29)(23,31)(25,28)(26,32) 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)(18,25,26,23)(20,27,29,30)(24,28,32,31)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.