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