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