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