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