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