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