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