One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,12,14)(11,13,15,16)(17,18,21,24)(19,27,30,41)(20,32,34,47)(22,35,33,26)(23,36,37,29)(25,40,39,28)(31,46,45,43)(38,44,42,48)(1,3,4,8)(2,5,6,7)(9,11)(10,13)(12,15)(14,16)(17,19,28,44,22,31,34,36,21,30,40,48,33,45,20,29)(18,23,32,43,26,38,39,41,24,37,47,46,35,42,25,27)(2,6)(5,7)(11,15)(13,16)(18,24)(23,37)(25,39)(26,35)(27,41)(32,47)(38,42)(43,46) involution — undirected(2,6)(5,7)(17,19,28,44,22,31,34,36,21,30,40,48,33,45,20,29)(18,23,32,43,26,38,39,41,24,37,47,46,35,42,25,27)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.