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