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