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