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