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