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