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