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