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)(13,14,18,19)(15,23,24,20)(16,21,25,28)(17,22,27,26)(5,7,9,8)(6,10,11,12)(14,19)(15,20)(16,25)(17,26)(22,27)(23,24)(1,2,3,4)(13,15)(14,20)(16,17)(18,24)(19,23)(21,26)(22,28)(25,27)(5,8,9,7)(6,10,11,12)(13,16,18,25)(14,21,19,28)(15,22,24,26)(17,23,27,20)(13,17,18,27)(14,22,19,26)(15,16,24,25)(20,28,23,21)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.