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)(11,14)(12,13)(15,16)(17,18,21,26,22,27,32,40,20,25,23,33,31,39,35,44)(19,24,29,37,30,38,42,47,28,36,34,43,41,46,45,48)(1,3,4,8)(2,5,6,7)(17,18,23,33,22,27,35,44,20,25,21,26,31,39,32,40)(19,24,34,43,30,38,45,48,28,36,29,37,41,46,42,47)(3,8)(5,7)(10,13)(14,16)(17,19)(18,24)(20,28)(21,29)(22,30)(23,34)(25,36)(26,37)(27,38)(31,41)(32,42)(33,43)(35,45)(39,46)(40,47)(44,48) involution — undirected(2,6)(5,7)(9,11,12,15)(10,14,13,16)(18,25)(19,28)(26,33)(27,39)(29,34)(30,41)(40,44)(42,45)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.