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