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