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