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