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