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