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