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