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