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