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