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