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