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