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