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