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