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