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