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