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