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