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