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