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