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