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