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