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