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)(17,18,21,24)(19,22,25,26)(20,23,28,30)(27,29,31,32)(2,7)(4,9)(8,13)(12,15)(17,18)(19,22)(20,23)(21,24)(25,26)(27,29)(28,30)(31,32)(33,34,38,39)(35,36,40,43)(37,41,45,46)(42,44,47,48)(2,7)(4,9)(5,14)(10,16)(19,25)(20,28)(22,26)(23,30)(34,39)(36,43)(37,45)(42,47) involution — undirected(1,3,6,11)(2,4,7,9)(5,10,14,16)(8,12,13,15)(17,18)(19,26)(20,23)(21,24)(22,25)(27,32)(28,30)(29,31)(33,35)(34,36)(37,42)(38,40)(39,43)(41,44)(45,47)(46,48)(1,4)(2,3)(5,12)(6,9)(7,11)(8,10)(13,16)(14,15)(17,19,21,25)(18,22,24,26)(20,27,28,31)(23,29,30,32)(33,36)(34,40)(35,39)(37,44)(38,43)(41,47)(42,46)(45,48)(1,5,6,14)(2,8,7,13)(3,10,11,16)(4,12,9,15)(17,20)(18,23)(19,27)(21,28)(22,29)(24,30)(25,31)(26,32)(33,37)(34,41)(35,42)(36,44)(38,45)(39,46)(40,47)(43,48)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.