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