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