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