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