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