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