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